TV.com hosts overviews and episode summaries for all episodes of "Parks and Recreation" alongside a whole host of other shows including most productions from most major broadcast networks. These summaries include plot overviews and highlights, among other things.
Episode overviews let viewers who are not caught up get a feel for what is happening on a given show. They can also help viewers gain a deeper understanding both of the plot and themes of a television program and of the making of that program.
Cast and crew information is often folded into summaries. This makes the summaries a good way to learn more about how shows are produced and what they're like behind the scenes.